W911SA-22-Q-3081 Attachment 5 Ft McCoy South Post Well 26 Wellhead Protection Plan.pdf

Wellhead Protection Plan Well No. 26

Fort McCoy, South Post OTM Community Public Water System

DNR Project No. W-2012-0430A

1st revision May 4th, 2021

Fort McCoy, South Post OTM Community Public Water System

Prepared for:

Fort McCoy, South Post OTM Community Public Water System

Prepared by:

Short Elliott Hendrickson Inc.

312 South 3rd Street

La Crosse, WI 54601-4007

608.782.3161

I, Randy Sanford, PE, hereby certify that I am a registered Professional Engineer in the State of

Wisconsin in accordance with ch. A-E 4, Wis. Adm. Code and that this report has been prepared in accordance with the Rules of Professional Conduct in ch. A-E 8, Wis. Adm. Code.

PE Number Date

Date

4 May 2021

Michael Miller Water and Wastewater

Branch Chief

Table of Contents

Page

1.0 Introduction

2.0 Background

2.1 Water System Overview

2.2 Local Setting

2.3 Local Geology

3.0 Identification of Groundwater Flow Direction

4.0 Identification of the Recharge Area and Zone of Influence

5.0 Identification of Existing Potential Contamination Sources Within One-Half Mile

Radius of Well

6.0 Establishment of Wellhead Protection Area (WHPA)

7.0 Public Education

8.0 Water Conservation Program

9.0 Contingency Plan

10.0 Management Plan

10.1 Wellhead Protection Area

10.2 Separation Distances

List of Tables Table 1 - Well No. 26 Geologic Formations Table 2 - Well No. 26 Potential Contamination Sources

Wellhead Protection Plan Page i

May 2021, first revision

Well No. 26 Prepared for Fort McCoy

1.0 Introduction

Wisconsin Department of Natural Resources (WDNR) and U.S. Environmental Protection Agency (USEPA) rules require that new community wells in Wisconsin have a WDNR-approved Wellhead Protection Plan (WHPP).

The purpose of a WHPP is to minimize the risk of contamination of public groundwater supplies by assessing and managing activities in the land area around the well. This WHPP details the type of groundwater supply sources, identifies the recharge areas and groundwater flow direction, and outlines a Wellhead Protection Area (WHPA) for the Village of Turtle Lake’s Well No.4.

Requirements for WHPPs are defined by Wisconsin Administrative Code § NR 811.12(6).

WHPPs shall include:

• Identification of zone of influence

• Identification of recharge area

• Identification of groundwater flow direction

• Identification and assessment of potential contamination sources

• Establishment of a wellhead protection area (WHPA)

• Public education program for wellhead protection

• Water conservation program

• Contingency plan

• Management plan

2.0 Background

2.1 Water System Overview

Well No. 26 was constructed in 2014 to meet the Fort McCoy South Post need of a reliable water source and more water supply due to increased development within the Family Housing Area. It replaced Well No. A, which was limited in its ability to be used as a potable water source to meet the needs of the South Post by shallow casing depth and smaller diameter casing for Well No. A.

Well No. A was drilled in 1928 within sandstone bedrock belonging to a Cambrian-age Formation. The sandstone formation occurred from 18 to 172 foot depths in Well No. A with an unconsolidated sand deposit overlying the sandstone bedrock. The well was constructed with a 10-inch primary casing to 30.8 feet below ground surface (Wisconsin DNR – Public Water Supply Systems).

Well No. 26 and Well No. 21 supply the South Post Other Than Municipal (OTM) public water system. The wells pump to two water storage tanks and the system’s distribution system.

2.2 Local Setting

Well No. 26 is located within the South Post Family Housing Area of Fort McCoy Military Reservation on a 545.5 acre parcel. The well is centered on a minimum 100-foot by 100-foot area designated as the well site parcel by adoption of this Wellhead Protection Plan.

The elevation at the site is approximately 864 feet MSL. The site is fairly flat. General topography slopes to the northwest toward the La Crosse River.

2.3 Local Geology

The sandstone formation at Well No. 26 occurs from approximately 20 to 172 foot depths with an unconsolidated sand deposit overlying the sandstone bedrock.

Formations encountered at the well are shown in the table below. Geologic information is based on the geologic log prepared by the well driller.

The well construction report for Well No. 26 is found in Appendix A.

Table 1 Well No. 26 Geologic Formations

Interval Top

(feet)

Interval Base (feet)

Formation

0 1 Topsoil 1 10 Brown sand

10 25 Dark brown sand 25 30 Orange sand 30 45 Dark brown sand 45 50 Brown sandstone with gravel 50 80 Yellow sandstone (hard) 80 140 Tan hard sandstone 140 172 White hard sandstone

Wellhead Protection Plan Page 2

3.0 Identification of Groundwater Flow Direction

NR 811.12(6)(a)

Groundwater flow direction is to the northwest as shown on the Wisconsin Geologic and Natural History Survey, Groundwater Elevation Map contained in Attachment A (WGNHS, September 1981).

4.0 Identification of the Recharge Area and Zone of Influence NR 811.12(6)(b)-(c)

The zone of influence (ZOI) was calculated based on Wisconsin Administrative Code NR 811 requirements of 30 days continuous pumping at the anticipated final pumping rate and assuming 1 foot of drawdown at the limits of the ZOI.

The ZOI for the proposed well was calculated using aquifer properties determined from a pumping test of Well No. 26. The ZOI for 30 days continuous pumping is approximately 1,200 feet.

The recharge area for the new well was calculated using the Uniform Flow Equation. The Uniform Flow Equation uses aquifer properties of transmissivity and ground water flow gradient. Transmissivity was calculated from a pumping test of Well No. 26. The groundwater flow gradient was estimated to be 0.007 ft/ft and was based on contours shown on the generalized groundwater elevation maps of Monroe County (Figure 1).

Calculations are found in Appendix B.

5.0 Identification of Existing Potential Contamination Sources Within One-Half Mile Radius of Well NR 811.12(6)(d)

A review of potential contaminant sources was conducted by searching Wisconsin Department of Natural Resources (WDNR), Wisconsin Department of Commerce (Commerce), and U.S. Environmental Protection Agency (USEPA) databases. During the well site investigation process, the site was also evaluated for separation from potential contaminant sources identified in Wis. Adm. Code Chapter NR811.

Potential contamination sources with one-half mile of the well location identified in the Public Water Supply Potential Contaminant Use Inventory form found in Appendix A and are

Wellhead Protection Plan Page 3 summarized in the table below, including an assessment of the potential for the contamination sources to impact the well.

Table 2 Well No. 26 Potential Contamination Sources

Map Code Description

Distance/Direction from Well 26 Potential to Impact Well

CRT Railroad track identified by Environmental First Search as Quarry Hill Road spill

> ½ mile northwest Unlikely to impact well

GFA Fuel storage tank: LP tank 50 feet south Unlikely to impact well: new double walled tank

WLS Leaking underground storage tank (LUST) site: Building 6250

> 1 mile south Unlikely to impact well, site is outside of the 1,200 foot setback

6.0 Establishment of Wellhead Protection Area (WHPA)

NR811.12(6)(e)

The WHPA is based on the portion of recharge area equivalent to a 5-year time of travel to Well No. 26 and is shown on Figure 2. Note that Figure 2 also depicts the capture zone for Well No. 21.

The time of travel was calculated using the fixed radius method. However, because this approach gives an area of less than 1,200 feet from well, a radius of 1,200 feet from Well No.

26 was used to establish the WHPA.

7.0 Public Education

NR811.12(6)(f)

The WHPP will be available to the public at the Public Works Department.

8.0 Water Conservation Program

NR811.12(6)(g)

See the Public Works Department for information pertaining to Water Conservation at Fort McCoy.

Wellhead Protection Plan Page 4

9.0 Contingency Plan

NR811.12(6)(h)

The South Post water supply contingency plan for replacing supply lost if a well should become contaminated includes several components:

1. There is no adjacent public water system for interconnection. Water can be trucked from the nearby Fort McCoy public water facilities.

2. The South Post relies on two wells to supply water for the distribution system. If one well becomes unusable due to contamination, it is reasonable to assume that the other well will still be usable.

3. If Well No. 26 tests positive for bacterial contamination, permanent chlorination equipment is provided at the pumphouse.

Key coordinators and contacts for implementing the contingency plan are listed below:

Wisconsin Department of Natural Resources Contact: Alex Avalos Phone: 608-790-5907

Fort McCoy Water and Wastewater Branch Chief Contact: Michael Miller Phone: 608-388-6546

Wisconsin Rural Water Association Phone: 715-344-7778

10.0 Management Plan

NR811.12(6)(i)

10.1 Wellhead Protection Area

A condition of the WDNR approval of the site for Well No. 26 is the designation of a 100-foot by 100-foot area, centered on the well, as the well site parcel. Fort McCoy will make this designation on its internal mapping and preserve the site for Well No. 26.

10.2 Separation Distances

For Well No. 26, the following minimum separation distances as specified in Wis. Adm. Code

s. NR811.12(5)(d) shall be maintained under the Management Plan:

1. Ten feet between a well and an emergency or standby power system that is operated by the same facility which operates the well and that has a double wall above ground storage tank with continuous electronic interstitial leakage monitoring.

2. Fifty feet between a well and a storm sewer main or a sanitary sewer main where the sanitary sewer main is constructed of water main class materials and joints.

3. Two hundred feet between a well and any sanitary sewer main not constructed of water main class materials, sanitary sewer manhole, lift station, one or 2 family residential heating fuel oil underground storage tank or above ground storage tank or POWTS treatment tank or holding tank component and associated piping.

Wellhead Protection Plan Page 5

4. Three hundred feet between a well and any farm underground storage tank system or other underground storage tank system with double wall and with electronic interstitial monitoring for the system, which means the tank and any piping connected to it. These installations shall meet the most restrictive installation requirements of Wis. Adm.

Code s. SPS 310.260 and receive written approval from the department of safety and professional services or its designated Local Program Operator under Wis. Adm.

Code s. SPS 310.110 These requirements apply to tanks containing gasoline, diesel, bio-diesel, ethanol, other alternative fuel, fuel oil, petroleum product, motor fuel, burner fuel, lubricant, waste oil, or hazardous substances.

5. Three hundred feet between a well and any farm above ground storage tank with double wall, or single wall tank with other secondary containment and under a canopy; other above ground storage tank system with double wall, or single wall tank with secondary containment and under a canopy and with electronic interstitial monitoring for a double wall tank or electronic leakage monitoring for a single wall tank secondary containment structure. These installations shall meet the most restrictive installation requirements of Wis. Adm.

Code s. SPS 310.260 and receive written approval from the department of safety and professional services or its designated Local Program Operator under Wis. Adm.

Code s. SPS 310.110. These requirements apply to tanks containing gasoline, diesel, bio-diesel, ethanol, other alternative fuel, fuel oil, petroleum product, motor fuel, burner fuel, lubricant, waste oil, or hazardous substances.

6. Four hundred feet between a well and a septic tank or soil adsorption unit with a design capacity of less than 12,000 gallons per day, a cemetery or a storm water retention or detention pond.

7. Six hundred feet between a well and any farm underground storage tank system or other underground storage tank system with double wall and with electronic interstitial monitoring for the system, which means the tank and any piping connected to it; any farm above ground storage tank with double wall, or single wall tank with other secondary containment and under a canopy or other above ground storage tank system with double wall, or single wall tank with secondary containment and under a canopy; and with electronic interstitial monitoring for a double wall tank or electronic leakage monitoring for a single wall tank secondary containment structure. These installations shall meet the standard double wall tank or single wall tank secondary containment installation requirements of Wis. Adm. Code s. SPS

310.260 and receive written approval from the department of safety and professional services or its designated Local Program Operator under Wis. Adm. Code s. SPS 310.110. These requirements apply to tanks containing gasoline, diesel, bio-diesel, ethanol, other alternative fuel, fuel oil, petroleum product, motor fuel, burner fuel, lubricant, waste oil, or hazardous substances.

8. One thousand feet between a well and land application of municipal, commercial, or industrial waste; the boundaries of a landspreading facility for spreading of petroleum-contaminated soil regulated under Wis. Adm. Code ch. NR 718 while that facility is in operation; agricultural, industrial, commercial or municipal waste water treatment plant treatment units, lagoons, or storage structures; manure stacks or storage structures; or POWTS dispersal component with a design capacity of 12,000 gallons per day or more.

9. Twelve hundred feet between a well and any solid waste storage, transportation, transfer, incineration, air curtain destructor, processing, wood burning, one time disposal or small demolition facility; sanitary landfill; any property with residual groundwater contamination that exceeds Wis. Adm. Code ch. NR 140 enforcement standards; coal storage area; salt or

Wellhead Protection Plan Page 6 https://docs.legis.wisconsin.gov/document/administrativecode/ATCP%2093.260 https://docs.legis.wisconsin.gov/document/administrativecode/ATCP%2093.260 https://docs.legis.wisconsin.gov/document/administrativecode/ATCP%2093.110 https://docs.legis.wisconsin.gov/document/administrativecode/ch.%20NR%20718 https://docs.legis.wisconsin.gov/document/administrativecode/ch.%20NR%20140 deicing material storage area; any single wall farm underground storage tank or single wall farm above ground storage tank or other single wall underground storage tank or above ground storage tank that has or has not received written approval from the department of safety and professional services or its designated Local Program Operator under Wis. Adm.

Code s. SPS 310.110 for a single wall tank installation. These requirements apply to tanks containing gasoline, diesel, bio-diesel, ethanol, other alternative fuel, fuel oil, petroleum product, motor fuel, burner fuel, lubricant, waste oil, or hazardous substances; and bulk pesticide or fertilizer handling or storage facilities.

Wellhead Protection Plan Page 7 https://docs.legis.wisconsin.gov/document/administrativecode/ATCP%2093.110

List of Figures Figure 1 – Groundwater Flow Direction

Figure 2 – Wellhead Protection Area

WELL

NO. 26

SW-A

SW-21

PROJECT LOCATION

State of Wisconsin Monroe County

WATER SYSTEM EVALUATION

Fort McCoy, Wisconsin

Figure

SOUTH POST

WELLHEAD

PROTECTION

AREA

1 inch = 1,000 feet

0 1,000 2,000500

Feet

8/1/2011 By: JLA

Legend:

Domestic Water Wells

Well Buffer Area (.5 Mi)

Fort McCoy Usage Area

Existing Contours Index Contour (50m)

Water Well Recharge Area Capture time

90 days

5 yrs

15 yrs

SOURCE: Monroe Co., WI DNR, ESRI, Ft. McCoy swojtkiewicz Oval swojtkiewicz Oval swojtkiewicz Callout Well No. 26 WHPA 1200' radius of well swojtkiewicz Text Box

0 1,000 2,000 FeetI